Does this game get any better?

I'm playing through RE6 right now and I'm finding it very hard to keep playing. I genuinely don't like anything about the game so far, especially the gameplay. The long length of chapters is also pretty daunting considering there's 20 of them and I've only finished chapter 2 after 4 hours. Does the game get any better after Leon's campaign? If not, I'm just gonna retire it.

You don't need to ask. Just retire it. Resident Evil 6 is the RE fan's Goku Button and you make it pretty obvious that you don't even like most over revelied games in long running franchises. If there was a narrative that "RE6 gets better after a certain point" like say Final Fantasy 13, this would've been commonly stated. The people who enjoyed RE6 were the guys who played Mercs mode than the actual campaigns.